Made of rugged, water-resistant 600-denier recycled polyester. Interior is lined with 150-denier recycled polyester. Yarn-dyed fiber has incredibly rich color that holds its vibrancy over time. All backpacks have adjustable PP webbing straps that are contoured and padded to ensure a comfortable fit; padded back panel adds extra cushioning. Features a YKK zipper closure with a Nickel finish. Exterior side pockets are designed to hold any of our water bottles (sold separately). Our glow-in-the-dark backpacks features a material that needs to “charge” under bright light for approximately half an hour to glow properly. Glow lasts for approximately 3 to 4 hours. The Glow effect will become weaker over time. FITS CHILDREN WHO ARE: 43–49" tall OVERALL: 12" wide x 6" deep x 15" high INTERIOR: 11.5" wide x 5.5" deep x 14.5" high EXTERIOR POCKETS: 3 EXTERIOR FRONT PANEL POCKET: 7" wide x 8.5" high EXTERIOR SIDE POCKET (2): 5" wide x 5.25" high INTERIOR POCKETS: 2 INTERIOR DIVIDED POCKET: 11.5" wide x 9.75" high SHOULDER STRAP LENGTH (2): 3" wide x 9.5–13.75" long CARRYING HANDLE: 1.25" wide x 7.5" long